Improvement in revolving harrows



J. HI-LL & J. (a. STEWART.

Improvement in Revolving Harrows.

N0 122,25]. 2 279-1. Patented Dec.

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UNITED STATES PATENT GFFICE.

JACOB HILL- AND JAMES G. STEWART, OF JONESVILLE, INDIANA.

IMPROVEMENT IN REVOLVING HARROWS.

Specification forming part of Letters Patent No. 122,251, dated December26, 1871.

accompanying drawing and to the letters of reference marked thereonwhich form a part of this specification.

The nature of our inven tlon conslsts 1n the construction andarrangement of a revolving harrow, as will be hereinafter more fully setforth.

In order to enable others skilled in the art to which our inventionappertains to make and use the same, we will now proceed to describe itsconstruction and operation, referring to the annexed drawing, in whichFigure 1 is a plan view, and Fig. 2 a side View of my machine.

' AArepresent two parallel side beams, connected at or near their frontends by means of two crossbars, B B, and with these form the frame ofour machine. In the side beams A A an axle, O, has its bearings, and onsaid axle are mounted the drivingwheels D D, one on each end of the axleinside of the frame. Upon one end of the axle 0, outside of the frame,is a large pulley, E, connected by a belt, a, with a small pulley, E, onthe end of a shaft, G, placed in suitable journalboxcs across the frontend of the frame. 0n the opposite end of this shaft is a large pulley, Econnected by a belt, I), with a pulley, E on one of the journals of aroller, H, which is mounted in the rear end of the frame. This roller isprovided with several series of spirally-arranged barrow-teeth, d d, andwhen the machine is in motion this roller obtains a very rapid rotatingmovement. The tongue I is secured in the center on the under side of thecross-bars B B. Between the tongue I and the front cross-bar B isinserted a stepped sliding-block, J, which is slotted longitudinally, sothat the bolt which secures the tongue to said cross-bar will passthrough the same. By adjusting this block at the dilierent steps, or, inother words, increasing or diminishing the distance between saidcross-bar and the tongue, the frame .is thrown more or less over backward, and hence the depth at which the harrow-teeth d d will workreadily regulated.

This harrow is perfectly balanced, and, as the driving-wheels are insideof the frame, the ground packed by them will at once be loosened by theroller.

Having thus fully described our invention, what we claim as new, anddesire to secure by Letters Patent,'is

The combination of the frame A B, roller H with spirally-arrangedbarrow-teeth d. d, tongue I, and slotted-stepped sliding-block J, allconstructed and arranged substantially as and for the purposes hereinset forth.

In testimony that we claim the foregoing as our own we aftlx oursignatures in presence of two witnesses.

J AGOB HILL. JAS. Gr. STEWART.

Witnesses T. F. ERRINGER,

